Claws Mail

Claws Mail
Developer(s)The Claws Mail Team
Initial releaseMay 11, 2001 (2001-05-11)
Stable release
4.3.1  / 24 February 2025
Preview releaseNone [±]
Repository
Written inC (with GTK)
Operating systemBSD, Linux, macOS, Solaris, Unix, Windows
TypeE-mail client, news client
LicenseGPL-3.0-or-later
Websitewww.claws-mail.org

Claws Mail is a free and open-source, C/GTK-based e-mail client, which is both lightweight and highly configurable. Claws Mail runs on both Windows and Unix-like systems such as Linux, BSD, and Solaris. It stores mail in the MH mailbox format. Plugins allow to read HTML mail, but there is none to compose HTML messages.